85618857766671 has 40 divisors (see below), whose sum is σ = 131358232847424. Its totient is φ = 55535834692800.

The previous prime is 85618857766661. The next prime is 85618857766691. The reversal of 85618857766671 is 17666775881658.

It is not a de Polignac number, because 85618857766671 - 2¹⁴ = 85618857750287 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85618857766661) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 326221146 + ... + 326483496.

Almost surely, 2^{85618857766671} is an apocalyptic number.

85618857766671 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

85618857766671 is a deficient number, since it is larger than the sum of its proper divisors (45739375080753).

85618857766671 is a wasteful number, since it uses less digits than its factorization.

85618857766671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371293 (or 371284 counting only the distinct ones).

The product of its digits is 5689958400, while the sum is 81.

The spelling of 85618857766671 in words is "eighty-five trillion, six hundred eighteen billion, eight hundred fifty-seven million, seven hundred sixty-six thousand, six hundred seventy-one".